Posts Categorized: Uncategorized

"Crontab -e Returns a Number" Problem

I sometimes find on a certain machine that when I change to a bash shell and try to edit the crontab with # crontab -e instead of getting my vi editor I just get a number returned, for example: # crontab -e3839 Obviously something to do with how the default editor is set in the… Read more »

Testing a SpamAssassin Install

SpamAssassin can be checked by feeding a text file into it and piping the result out to another text file. Amendments can be made to the input file to check for effectiveness. Consider using the 'GTUBE' phrase as a trigger to increase the score and label a message as spam. spamassassin -t < sample-spam.txt >… Read more »

Adding Perl Modules

Using CentOS5/RHEL5 I needed to add some perl modules for SpamAssassin. Note sure how important this first step is but I:# cd /root/.cpan/sources# wget # perl -MCPAN -e shell when asked about configuration I said 'no' and allowed the autoconfiguration to take place. I then arrived at the CPAN prompt:  cpan>  install Mail::SPF::Query cpan>  install… Read more »

Slow SSH Logins

On a new server install on CentOS 5.1 I was getting very slow logins. Trying ssh with the -v (verbose) option showed that: debug1: Authentications that can continue: publickey,gssapi-with-mic,passworddebug1: Next authentication method: gssapi-with-micdebug1: Unspecified GSS failure.  Minor code may provide more informationNo credentials cache found To skip this and continue with password authentication I amended… Read more »


I had a problem installing a new virtual machine using Xen and virt-manager on CentOS 5.1.I could not choose a network device as the drop-down list/menu was empty. From the bug at the following page: I downloaded the file and copied it to the server at: /usr/share/virt-manager/virtManager/ then ran: cd /usr/share/virt-manager/virtManager/ patch -p0 <… Read more »

Nagios and Checking Squid

After installing Nagios I created three files to define all the services I wanted to monitor: hosts.cfg hostgroups.cfg services.cfg SquidI used the check_squid code from the relevant details to each of my 3 config files for Nagios.I encountered a problem though as the check_squid perl script makes use of a Perl module LWP::UserAgent which… Read more »

Infra Recorder – Free Nero Alternative for Windows

InfraRecorder is a CD burning software application for Windows. It is a free alternative to using the expensive trial-limited Nero software. This software is best used for burning a Ubuntu ISO image to remove Windows from your life and replace it with free software.

Picasa Web Albums on Linux

PICASA 2.5 web-album Im using Ubuntu Edgy on i386 and this is what I did to get it working: 1. I installed Picasa as usual (v2.2 for linux)2. I started it up and scanned some folder containing photos3. Shut down picasa AND the media detector4. Instlled wine (apt-get install wine)5. Downloaded picasa 2.5 for windows… Read more »

Ubuntu Feisty Fawn Install with ATI Radeon x1600

I had difficulty trying to install Ubuntu 7.04 Fiesty Fawn on a new Novatech Laptop. The laptop uses an ATI Radeon x1600 graphics processor. When starting the LiveCD Ubuntu stops as it is unable to start x. This problem seems to have been introduced in an Alpha version of Feisty and is not yet resolved…. Read more »

Mount ISO image under Linux

“ISO Master” program is a GUI which may be useful available from the Get Deb website. You can mount ISO images via the loop device. It is possible to specify transfer functions (for encryption/decryption or other purposes) using loop device. But how to mount ISO image under Linux? You need to use mount command as… Read more »